• WordNet 3.6
    • n isotherm (meteorology) an isogram connecting points having the same temperature at a given time
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Webster's Revised Unabridged Dictionary
    • Isotherm (Phys. Geog) A line connecting or marking points on the earth's surface having the same temperature. This may be the temperature for a given time of observation, or the mean temperature for a year or other period. Also, a similar line based on the distribution of temperature in the ocean.
    • Isotherm (Physics) A line on a graph connecting points representing states having the same temperature; an isothermal line.
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Century Dictionary and Cyclopedia
    • n isotherm A line connecting points on the earth's surface having the same mean temperature. Such a line may be either an imaginary one or one actually drawn on a map or chart of the region embraced by the observations. When the term isotherm is used without qualification, or when it is not otherwise necessarily understood from the context, the mean of the year, or, more properly, of a long series of years, is intended. The isotherm of the winter months is sometimes designated as the isochimal or isochimenal; that of the summer months as the isotheral.
    • n isotherm In mathematics, a curve representing phenomena which happen at constant temperature.
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Chambers's Twentieth Century Dictionary
    • n Isotherm an imaginary line connecting places on the earth which have the same mean annual temperature
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Webster's Revised Unabridged Dictionary
Iso-, + Gr. heat, fr. hot
Chambers's Twentieth Century Dictionary
Fr. isotherme—Gr. isos, equal, thermē, heat—thermos, hot.


In literature:

They have also comparatively high temperatures; the isotherm for 10 deg.
"The South Pole, Volumes 1 and 2" by Roald Amundsen
The season here, owing to a sharp northern sweep of the isothermal lines, is two or three weeks earlier than at Quebec.
"Locusts and Wild Honey" by John Burroughs
This construction also adds to isothermal economy.
"Scientific American Supplement, No. 799, April 25, 1891" by Various
The mean yearly isothermals crossing the state are ordinarily 35 deg.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6" by Various
S., or approximately within the isothermal lines of 60 deg.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 5" by Various
The normal trend of the annual isotherms of the state is very simple: a low line of about 40 deg.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1" by Various
The January isotherm of 15 deg.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 4" by Various
Dove, Mr., map of isothermal lines, 93.
"Principles of Geology" by Charles Lyell
So, too, the isothermal of 5 deg.
"The Philosophy of the Weather" by Thomas Belden Butler
The extreme range of the monthly isotherms crossing the state is from about 35 deg.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 5" by Various

In news:

Setpoint accuracy, stability and isothermality of ±0.1°C are common with a single-heated zone using an off-the-shelf temperature controller.
Neogen Corp ANSR (Amplified Nucleic Single Temperature Reaction) isothermal pathogen detection system.
The president of the North Carolina Community College System, Dr R Scott Ralls, will meet with the Isothermal Community College Board of Trustees today at 9 am to discuss the college's search for a new president.
Isothermal Community College's Small Business Center is for anyone.

In science:

P ,ρ)-isotherms to a simple power law of the form aρ2 + bρ + c.
Phase Behavior of a Simple Model for Membrane Proteins
Equation of state, or (P ,ρ)-isotherm, calculated at the same temperature for two different ranges of interactions: (a) estremely short (α = 50), (b) extremely long (α = 0.1).
Phase Behavior of a Simple Model for Membrane Proteins
For this isothermal pre-shock flow, the entropy decreases with rising gas density as the flow converges toward the shock in the AD1 flows.
Entropy Evolution in Galaxy Groups and Clusters; A Comparison of External and Internal Heating
With the new data, the spectral energy distributions of the galaxies can no longer be fitted with an isothermal dust model – two temperature components are now required.
The SCUBA Local Universe Galaxy Survey II. 450 micron data - evidence for cold dust in bright IRAS Galaxies
With the data then available to us (60, 100 and 850µm fluxes) we were only able to fit simple isothermal models of the dust spectral energy distributions (SEDs).
The SCUBA Local Universe Galaxy Survey II. 450 micron data - evidence for cold dust in bright IRAS Galaxies